1891. Geological Survey (U.S.). Contour interval 5 feet.;"Surveyed in 1889.";Relief indicated by contours.;1 map, colored;45 x 34 cm.;1:62,500. Geological Survey (U.S.).
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1891. Gannett, Henry, 1846-1914. U.S. Geological survey. Thirteenth Annual Report, pl. 1.;1 map, colored;44 x 72 cm.;1:7,000,000. U.S. Geological Survey (Washington, D.C.), [1893?].